As the author writes, "Slack is communication software popular for handling workplace information flow, project management, customer support, and all kinds of other things." It's popular in the developer and project management communities. But how is it as a learning application? Well, it doesn't have a system for keeping grades (but who would want one, really?). But typical tasks, such as sharing files or commenting on each others' work, are easy. Is it working? Maybe. "There’s a sense of community from Slack that I don’t think I would every get from Canvas, because sometimes it’s just fun, and that’s part of what makes it work." But that might just be that new-product shininess.